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Chapter:Surface Tension

Introduction:

Surface Tension is the tendency of fluid surfaces to shrink into the minimum surface area possible. Surface tension allows insects, usually denser than water, to float and slide on a water surface. Surface tension results from the greater attraction of liquid molecules to each other than to the molecules in the air.

Chapter Analysis:

Expect for the year of 2014 and 2013, no question has been asked from this chapter in the other years. The last 5 years have had a drought for the questions from this chapter. Hence, we should not be expecting any question from this chapter in the upcoming paper.
The below given graph will illustrate the above-mentioned analysis:

Year 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009
Questions 0 0 0 0 0 1 1 0 0 0 0
 

The important topics to be covered from this chapter are:
• Surface Energy and Surface Tension
• Angle of Contact
• Excess of Pressure across a Curved Surface
• Application of Surface Tension ideas to Drops, Bubbles and Capillary Rise

Tips and Tricks:

• The students must begin with reading the NCERT portion as it has a good basic explanation of the chapter and helps form the base for further reading. Here is the link to the NCERT PDF version of the mentioned chapter:
• Flash Cards are to be created by the students so that they are able to revise the parts and their functions easily.
• Mnemonics may be created uniquely by the student so that they are able to retain the parts in their mind easily.
• All the past year questions must be solved so that one understands the type of questions that are asked in the paper.
• Revision every week should be done to keep the chapter fresh.

 

Q. ?